US3550557A - Teat cup - Google Patents

Teat cup Download PDF

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Publication number
US3550557A
US3550557A US736060A US3550557DA US3550557A US 3550557 A US3550557 A US 3550557A US 736060 A US736060 A US 736060A US 3550557D A US3550557D A US 3550557DA US 3550557 A US3550557 A US 3550557A
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US
United States
Prior art keywords
liner
shell
teat cup
pulse space
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US736060A
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English (en)
Inventor
Frank Edward Goldsmith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Laval Separator Co
Original Assignee
De Laval Separator Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by De Laval Separator Co filed Critical De Laval Separator Co
Application granted granted Critical
Publication of US3550557A publication Critical patent/US3550557A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J5/00—Milking machines or devices
    • A01J5/04—Milking machines or devices with pneumatic manipulation of teats
    • A01J5/08—Teat-cups with two chambers

Definitions

  • TEATCUP This invention relates to a teat cup for milking machines and has particular reference to improvements in the pulsation system.
  • the teat cups of milking machines each comprise a rigid outer shell and a resiliently flexible tubular liner inside the shell.
  • the liner is sealed at the top and bottom of the shell and the lower end of the liner is connected to a constant vacuum source, milk being withdrawn from the teats under the influence of the vacuum in the liner.
  • a restricted passage is arranged between the interior of the liner and the pulse space in each teat cup, and the pulse space is alternately connected to and isolated from atmosphere without being subjected to partial vacuum other than through this restricted passage.
  • the invention also contemplates a teat cup in which a permanently open restricted passage is provided between the interior of the liner and the pulse space of the teat cup.
  • the liner may be stretched between the ends of the shell in a conventional way, or the lower end of the liner may be free of the shell, the clearance between the liner and shell constituting the restricted passage.
  • FIG. 1 is a vertical sectional view of two teat cups of a cluster, showing one embodiment of the invention
  • FIG. 2 is a similar view of another embodiment
  • FIG. 3 is a vertical sectional view of still another embodiment of the new teat cup.
  • each teat cup comprises a rigid outer shell 1 having a flexible liner 2 stretched between the ends of theshell and integral with a milk tube 3.
  • the shell has an air nipple 4 connected by a tube 6 to a pulsator (not shown).
  • a restricted passage in the form of an orifice 7 through the wall of the liner 2 provides communication between the interior of .the liner and the pulse space 8.
  • the interior of the liner is connected to a source of constant vacuum by the milk tube 3 and the usual milk claw (not shown).
  • the pulsator acts as a simple valve which opens and closes at a controlled rate, alternately admitting atmospheric air to the pulse space 8 and closing off the supply of air.
  • the liner When air enters the pulse space from the pulsator by way of tube 6, the liner is collapsed, as shown in the left-hand part of FIG. 1, and some air passes through the orifice 7 to displace milk through the milk tube. 3, When the pulsator valve closes, more air is drawn through the orifice 7 to reduce the pressure in pulse space 8, causing the liner 2 to relax (right-hand half of FIG. 1) without any back surge of milk.
  • FIG. 2 operates on the same general principles as the FIG. 1 arrangement.
  • F IG. 2 the lower end of the liner 2 is free of the shell 1, being formed with a thickened rim 2A which fits closely within the shell but with a narrow annular clearance 7a constituting the restricted passage.
  • opening of the pulsator valve collapses the liner only partially and thus does not cause it to close off completely (left-hand part of FIG. 2).
  • the air pressure in pulse space 8 causes some slight stretching of the liner.
  • Closure of the pulsator acts in the abovedescnbed manner whereby an IS drawn from pulse space 8 through the restricted'passage 7a to displace milk and allow the liner 2 to relax (right-hand part of FIG. 2). In this case, milk is delivered into the interior of the shell 1, to which the milk tube 3 is directly connected.
  • the upper end of the liner 2 is anchored to the upper end of the outer shell 1, and the lower end is releasably secured to a flared nipple ll of a rigid moulding 12 which closes the lower end of the shell.
  • the liner is locked to the nipple by a so-called grab-ring" 13, whose locking action is ensured by the liner being stretched on assembly with the shell.
  • the moulding I2 is of a diameter to pass through the shell, to facilitate assembly, and is restrained by a locking ring 14.
  • the moulding is formed integrally with the milk tube 3 and with the tube 6 which intermittently admits air to the pulse space 8.
  • the restricted passage in FIG. 3 is constituted by a hole 7 through the wall of the moulding, and operation of the teat cup is the same as that of FIG. 1.
  • the air valve used with the above-described teat cups can take many constructional forms but is preferably in the form of a conventional vacuum pulsator modified simply by closing ofi its vacuum channel, whereby tube 6 alternately supplies air to the space 8 and cuts off the supply.
  • Standard vacuum pulsators are readily available and operate reliably to give a suitable number of reversals per unit of time, but special purpose valves could, of course, be used if desired.
  • each teat cup is provided with an air inlet to its pulse space 8, whereby the latter can be intermittently supplied with air through this inlet and is subjected to partial vacuum only by way of the restricted passage 7 or and the milk tube 3.
  • a teat cup for a vacuum milking machine which comprises a rigid outer shell and a flexible liner located within the shell to form a pulse space between the shell and liner, there being a restricted passage through which the interior of the liner communicates with said pulse space, the liner being adapted for connection of its interior to a vacuum source and the teat cup having an air inlet to said pulse space, whereby the pulse space can be intermittently supplied with air through said inlet and subjected to partial vacuum only through said restricted passage, the upper end of the liner being anchored to the upper end of the outer shell, the lower end of the liner being provided with a thickened rim which is free of the shell but fits closely therein, the restricted passage being constituted by a narrow annular clearance between the rim and the shell.

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  • Life Sciences & Earth Sciences (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • External Artificial Organs (AREA)
  • Air Transport Of Granular Materials (AREA)
US736060A 1967-06-12 1968-06-11 Teat cup Expired - Lifetime US3550557A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB27003/67A GB1168507A (en) 1967-06-12 1967-06-12 Improvements in or relating to Milking Machines

Publications (1)

Publication Number Publication Date
US3550557A true US3550557A (en) 1970-12-29

Family

ID=10252613

Family Applications (1)

Application Number Title Priority Date Filing Date
US736060A Expired - Lifetime US3550557A (en) 1967-06-12 1968-06-11 Teat cup

Country Status (6)

Country Link
US (1) US3550557A (forum.php)
AT (1) AT285239B (forum.php)
BE (1) BE716440A (forum.php)
ES (1) ES354559A1 (forum.php)
GB (1) GB1168507A (forum.php)
NL (1) NL6807871A (forum.php)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5178095A (en) * 1991-06-13 1993-01-12 Dec International, Inc. Milking system with positive pressure on thin liner
US5482004A (en) * 1994-05-16 1996-01-09 Alfa Laval Agri, Inc. Collapsible teat liner with reinforced barrel
US5493995A (en) * 1994-05-16 1996-02-27 Alfa Laval Agri, Inc. Collapsing teat cup liner with tapering barrel wall
WO2013095291A1 (en) * 2011-12-22 2013-06-27 Delaval Holding Ab A milk conduit, and a milk conduit assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5178095A (en) * 1991-06-13 1993-01-12 Dec International, Inc. Milking system with positive pressure on thin liner
US5482004A (en) * 1994-05-16 1996-01-09 Alfa Laval Agri, Inc. Collapsible teat liner with reinforced barrel
US5493995A (en) * 1994-05-16 1996-02-27 Alfa Laval Agri, Inc. Collapsing teat cup liner with tapering barrel wall
WO2013095291A1 (en) * 2011-12-22 2013-06-27 Delaval Holding Ab A milk conduit, and a milk conduit assembly
US9775324B2 (en) 2011-12-22 2017-10-03 Delaval Holding Ab Milk conduit, and a milk conduit assembly

Also Published As

Publication number Publication date
BE716440A (forum.php) 1968-11-04
AT285239B (de) 1970-10-27
GB1168507A (en) 1969-10-29
NL6807871A (forum.php) 1968-12-13
ES354559A1 (es) 1969-11-01

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